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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Following
<a href="https://wiki.openstack.org/wiki/StableBranch#Proposing_Fixes">https://wiki.openstack.org/wiki/StableBranch#Proposing_Fixes</a>, I’ve tagged
</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black"><a href="https://bugs.launchpad.net/oslo/+bug/856764">https://bugs.launchpad.net/oslo/+bug/856764</a> with
</span><b><span style="font-size:10.5pt;font-family:"Arial Unicode MS","sans-serif";color:#333333;background:white">havana-backport-potential</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> Tim Bell
<br>
<b>Sent:</b> 21 May 2014 17:39<br>
<b>To:</b> 'Michael Dorman'; Belmiro Moreira; OpenStack Operators<br>
<b>Subject:</b> RE: [Openstack-operators] nova-compute not consuming messages<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Looks like a good stable backport candidate<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Tim<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> Michael Dorman [<a href="mailto:mdorman@godaddy.com">mailto:mdorman@godaddy.com</a>]
<br>
<b>Sent:</b> 21 May 2014 17:22<br>
<b>To:</b> Belmiro Moreira; OpenStack Operators<br>
<b>Subject:</b> Re: [Openstack-operators] nova-compute not consuming messages<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">Actually, I lied. This change has been merged and is part of Icehouse.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">We are still running on Havana, though, and haven’t actually tried it. People we talked to have had success with it, though.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">From:
</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">Michael Dorman <<a href="mailto:mdorman@godaddy.com">mdorman@godaddy.com</a>><br>
<b>Date: </b>Wednesday, May 21, 2014 at 9:14 AM<br>
<b>To: </b>Belmiro Moreira <<a href="mailto:moreira.belmiro.email.lists@gmail.com">moreira.belmiro.email.lists@gmail.com</a>>, OpenStack Operators <<a href="mailto:openstack-operators@lists.openstack.org">openstack-operators@lists.openstack.org</a>><br>
<b>Subject: </b>Re: [Openstack-operators] nova-compute not consuming messages<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">We see the same behavior, and a lot of other people have this problem, too. It’s related to how the Rabbit client code is handling disconnects/reconnects. Do
you happen to be connecting to Rabbit through a load balancer?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">We don’t have a create solution for this, but talked to several folks at the Summit for ideas.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">See this bug: <a href="https://bugs.launchpad.net/oslo/+bug/856764">https://bugs.launchpad.net/oslo/+bug/856764</a> and this review: <a href="https://review.openstack.org/#/c/76686/">https://review.openstack.org/#/c/76686/</a> for
a possible solution. This has not been merged in yet, though.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:black">Mike<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">From:
</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">Belmiro Moreira <<a href="mailto:moreira.belmiro.email.lists@gmail.com">moreira.belmiro.email.lists@gmail.com</a>><br>
<b>Date: </b>Wednesday, May 21, 2014 at 8:05 AM<br>
<b>To: </b>OpenStack Operators <<a href="mailto:openstack-operators@lists.openstack.org">openstack-operators@lists.openstack.org</a>><br>
<b>Subject: </b>[Openstack-operators] nova-compute not consuming messages<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Hi,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">In our infrastructure we are observing that some compute nodes are reporting the state correctly but not consuming messages.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">For the scheduler they are available, so it schedules VMs on them, and then the messages are pilling up in the compute.”host” queues.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Restarting nova-compute solves the problem. All old messages in the queue are consumed and they start behaving properly until next time…<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">I don’t get anything interesting from the logs.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">We are using rabbit 3.2.4 clustered with mirror queues and Havana 2.
<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Anyone observed the same symptoms?<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">thanks,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Belmiro<o:p></o:p></span></p>
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